Discontinued in 2000, the 70 ton (64 t) Grove RT870 Rough Terrain crane has a 125 ft. (38 m) main boom max length, and a max jib length of 60 ft. (18 m) and is powered by a turbocharged, six-cylinder Cummins 6CTA 8.3L diesel engine which generates up to 250 hp (191 kW). An optional Caterpillar 3116TA diesel engine is available and it comes standard with an 80 gallon (303 L) fuel tank.

The box-section frame is fabricated from high-strength, low alloy steel, and it comes with important outrigger housings and tie down lugs.

It features a full vision steel-fabricated operator’s cab that comes with acoustical lining and tinted safety glass, and its advanced dash panel is equipped with gauges for all engine functions. Other standard features in the cab include: a hydraulic oil cab heater/defroster, a telescoping tilt wheel, sliding side and rear windows, opening skylight, electric skylight wipers, a fire extinguisher, and an ashtray.

Options include: an engine block heater, air conditioning, boom mounted worklights, cross axle differential locks, 3rd wrap indicators, an auxiliary oil cooler, and remote-mounted cab spotlights.